In GTA III, "Chunky" Lee Chong pushes SPANK through a Punk Noodles stand in the pedestrian-only section of Chinatown, until he is killed by Claude on orders from Joey Leone. In GTA Liberty City Stories, Toni Cipriani can work for Punk Noodles as a delivery boy in a side mission using a delivery scooter bearing the chain's livery. Once complete, Toni will have 25% more health, indicated by a plus (+) to the left of his health bar, and they begin to pay protection money. In GTA III it has a factory located in Pike Creek, Shoreside Vale, but in 1998 the building is the Holy rev. Joe's Flophouse.
Punk Noodles is obviously a parody on the name "Cup Noodles", a company that makes instant noodles.
In the beta of GTA III, instead of the diner there was a park in it's place.